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fix(block_cache): ensure stats for tidied blocks are updated

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This commit is contained in:
Marcus Holland-Moritz 2025-03-28 09:28:50 +01:00
parent 0f0249b1ee
commit 06b7ddc533
1 changed files with 21 additions and 8 deletions
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29
src/reader/internal/block_cache.cpp
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@ -333,14 +333,9 @@ class block_cache_ final : public block_cache::impl {
cache_.~lru_type();
new (&cache_) lru_type(max_blocks);
cache_.setPruneHook(
// NOLINTNEXTLINE(cppcoreguidelines-rvalue-reference-param-not-moved)
[this](size_t block_no, std::shared_ptr<cached_block>&& block) {
LOG_DEBUG << "evicting block " << block_no
<< " from cache, decompression ratio = "
<< double(block->range_end()) /
double(block->uncompressed_size());
on_block_removed("evicted", block_no, std::move(block));
blocks_evicted_.fetch_add(1, std::memory_order_relaxed);
update_block_stats(*block);
});
}
@ -547,6 +542,17 @@ class block_cache_ final : public block_cache::impl {
}
private:
// NOLINTBEGIN(cppcoreguidelines-rvalue-reference-param-not-moved)
void on_block_removed(std::string_view action, size_t block_no,
std::shared_ptr<cached_block>&& block) {
// NOLINTEND(cppcoreguidelines-rvalue-reference-param-not-moved)
LOG_DEBUG << "block " << block_no << " " << action
<< " from cache, decompression ratio = "
<< double(block->range_end()) /
double(block->uncompressed_size());
update_block_stats(*block);
}
static std::unique_ptr<sequential_access_detector>
create_seq_access_detector(size_t threshold) {
if (threshold == 0) {
@ -714,9 +720,14 @@ class block_cache_ final : public block_cache::impl {
while (it != cache_.end()) {
if (predicate(*it->second)) {
it = cache_.erase(it);
blocks_tidied_.fetch_add(1, std::memory_order_relaxed);
LOG_TRACE << "tidying block " << it->first;
it = cache_.erase(
it, [this](size_t block_no, std::shared_ptr<cached_block>&& block) {
on_block_removed("tidied", block_no, std::move(block));
blocks_tidied_.fetch_add(1, std::memory_order_relaxed);
});
} else {
LOG_TRACE << "keeping block " << it->first;
++it;
}
}
@ -732,6 +743,7 @@ class block_cache_ final : public block_cache::impl {
std::cv_status::timeout) {
switch (tidy_config_.strategy) {
case cache_tidy_strategy::EXPIRY_TIME:
LOG_DEBUG << "tidying cache by expiry time";
remove_block_if(
[tp = std::chrono::steady_clock::now() -
tidy_config_.expiry_time](cached_block const& blk) {
@ -740,6 +752,7 @@ class block_cache_ final : public block_cache::impl {
break;
case cache_tidy_strategy::BLOCK_SWAPPED_OUT: {
LOG_DEBUG << "tidying cache by swapped out blocks";
std::vector<uint8_t> tmp;
remove_block_if([&tmp](cached_block const& blk) {
return blk.any_pages_swapped_out(tmp);